Add translation process and small fixes

[HarelM]

Launch Checklist

This adds information about how to translate Maputnik and how to get in touch with people who have translated in the past.
@keichan34, @jieme, @lhapaipai - I need your approval for this so that people in the future will know to contact you in case text is being added and they need help translating it.

CC: @ianthetechie

I've also changed the word "Language" in the upper part of the screen so that it won't be translated in case you accidentally switch language, and you need to switch back.

I've also fixed some RTL issues in the CSS and updated the maplibre components labels when the language changes.

[lhapaipai]

It's ok for me.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.

Project coverage is 58.60%. Comparing base (4dd34e9) to head (64e426b).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/components/MapMaplibreGl.tsx	71.42%	2 Missing ⚠️
src/libs/zoomcontrol.ts	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #930      +/-   ##
==========================================
- Coverage   58.70%   58.60%   -0.11%     
==========================================
  Files         104      104              
  Lines        3020     3027       +7     
  Branches      669      669              
==========================================
+ Hits         1773     1774       +1     
- Misses       1247     1253       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[keichan34]

Thank you for creating locales/README.md!

[ianthetechie]

Thanks for the mention @HarelM! I can strike the less complete localization guide from my work in progress PR now :)

[HarelM]

Let's have this deployed, other issues can be fixed later on.